What would be the implications of reducing blocktime to 5m, while also reducing the size and reward by 2x.
The amount of blocks needed to have the halving would be increased by 2x, so they still happen every 4 years at average.

Fractional reserve banking type of things can be done with fungible items. Is there any change to bitcoin (or bitcoin style crypto) that would make fractional reserve banking or something else, impossible or harder to exist?

As some example, would Demurrage make it harder to happen?

EDIT: Reposted the question from wikipedia ( https://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Humanities ) because I saw it would be a better place to ask those questions.~~~~

We have transactions fees, to avoid creating tons of transactions and increase the blockchain size to a extreme amount.

Those transactions fees are sent to the next user who is the miner.

How would the economy of a coin would change if instead of sending the transaction fee to be mined, the transaction fee was frozen and 1 year after it it would be sent back to the wallet. The user wont lose that money, but still can't keep making tons and tons of transactions to spam the blockchain.

Is there any site that show what % transaction is the current transactions fees?

Lets imagine at an block of the coin ExampleCoin 200 coins at total were sent from wallets to other wallets. And the amount ExampleCoins used as transaction fees to make all those transactions of those blocks were 1.

The value I want to find is X where X is (100/200) * 1, so 0.5


Is there any site that show the value of X overtime of a coin.

Is there any site that instead of showing how much the value of bitcoin at day X+N is compared to the dollar at the same day X+N, so, how much the price of bitcoin is at the day X+N compared to dollar at the specific day X?

At all sites I could find, if you look at the price of bitcoin at january first 2020, it will how much of january first 2020 dollars, this january first 2020 bitcoin is worth. So it will show as some example 1 BTC = 1000 Dollars, but its implied that it is saying 1 BTC (january first 2020 value of the currency) = 1000 dollar (january first 2020 value of the currency).

Lets call bitcoin B and dollar D, the site will sort of show this formula: 1 B = 1000 D.

The problem is that the value of coins, like btc, dollars, euro, or anything else.... changes over time.
At another date, lets say december 1 2020 the site will show 1 BTC = 1200 D, being implied that its saying 1 BTC (december 1 2020 value of the currency) = 1200 D (december 1 2020 value of the currency). The thing is, if the january first 2020 formula was 1 * B = 1000 * D, the formula for an another date will be ((1 * Y) * B) /Y = (( 1000 * Z) * D) /Y where Y is how much the value of BTC increased or decreased and Z how much the value of the dollar increased or decreased.
If at december 1 2020, it shows 1 B = 1200 D, we can't solve the equation ((1 * Y) * B) /Y = (( 1000 * Z) * D) /Y to find the value of Y, first because at 1 B = ((1 * Y) * B) /Y , the value of Y can be anything that is not 0, and at 1200 * B = (( 1000 * Z) * D) /Y is also not solvable, only being able to know that Y is not 0 and Z is 1200 * Y.

So, is there any site that allow me to compare the value of bitcoin over time, with the value of dollar at some very specific day X? At the previous formulas it would be finding the value of Y

Is there a site showing the price of crypto coins over time compared to the value of btc or dollar at a specific day?

There are alot of sites where you can look how the price of some coin changed over time, but when the site compares the value of some coin X, to the value of dollar or btc, it compares to the value dollar/btc at same day X.

So what if I wanted to compare lets say how much the value (or market cap) of NXT increased or decreased over time in BTC (January 1st 2014 bitcoin value), is there any site that allows me to see that info?

EDIT:

To those unsure what I want, this is how it would be done (and can be done) if it was done manually:

Assuming you want to compare nxt and will use Dollar (january first 2014) as the guideline, you can do this:

First, you look at some normal site and find that:
1 Dollar (january first 2014)  = 1*X dollars (january first 2015)
1 Dollar (january first 2014)  = 1*Y dollars (january first 2016)
1 NXT (january first 2014) =  Z Dollars (january first 2014)
1 NXT (january first 2015) =  W Dollars (january first 2015)
1 NXT (january first 2016) =  N Dollars (january first 2016)


Based at all that info, then you calculate and find the value you want, as some example to find the value of NXT (january first 2015) you would do:
1 NXT (january first 2015) =  (W Dollar (January first 2015)) / X

Assuming you want to find the value of NXT (january first 2016) you would do.
1 NXT (january first 2016) =  (N Dollar (January first 2016)) / Y

Would a hypotethical proof of transaction fees work as a mining method?

Imagine at the first month coins are mined by proof of work and then after it the miner is selected based at the amount of money they used as transactions fees, would this hypotethical proof-of-X work?